Awww, everyone plays so rough against the XLR... I have to ask if you have actually seen one, much less sat in one. I have done everything but drive it, and I came away quite impressed. Granted, it isn't an SL550 by any means, and I doubt anything will be able to top that as the top GT Convertable, but the XLR offers a great value when compared to the previous SL.
In it's debut comparison test, the XLR finished third in a group that included the Lexus SC430, Mercedes-Benz SL500, Porsche 911 Carrera 4 Cabrio, and Jaguar XK8 Convertable. The Jag finished in last, followed by the Lexus, then the Caddy, Porsche, then the Merc.
Maybe I've got my GM blinders on too high, but quite frankly, I don't care. The looks are different, the performance is on par with the German rivals, and if anything else, it's a Cadillac. Granted, the SL is better (Derrrrrr!!!), but the only thing that would keep me from buying an XLR at that price would be the Jaguar XJ8.
But given the "old-folks" nature that the Jag carries in the US, it might not be the best pick of the pack. I love older-folks cars myself, and I would dare to say that at the moment, the Jag XK8 is one of the best looking cars available on the road, second only to the Aston twins that it shares so many of it's parts with.